CN115180546B - An on-line monitoring device and monitoring method for hoisting machinery that is easy to disassemble - Google Patents

Abstract

The invention discloses a hoisting machinery online monitoring device and a monitoring method thereof which are easy to disassemble and assemble, and relates to the related field of hoisting machinery. In order to solve the problem that there is currently no online monitoring device specially aimed at the working process of the hoisting drum driven by the driving motor on the hoisting mechanism , generally rely on the work experience of the staff to judge whether it is working normally, and there is no intuitive data to prove that the work is abnormal. One side of the crane driving arm plate is provided with a mounting plate, and the upper end of the other side of the mounting plate is welded and fixed with a bearing seat, and a rotating worm wheel is rotatably connected to the bearing seat, and the bearing seat is connected with the rotating worm wheel An angular velocity sensor is installed, and the lower end of the other side of the mounting plate is welded and fixed with an L-shaped bracket, and a driving and rotating assembly is installed between the L-shaped bracket and the mounting plate, and the driving and rotating assembly includes a cam and an intermediate shaft, and the cam and The intermediate shaft is located between the L-shaped bracket and the mounting plate.

Description

An on-line monitoring device and monitoring method for hoisting machinery that is easy to disassemble

technical field

The invention relates to the related field of hoisting machinery, in particular to an on-line monitoring device and a monitoring method for a hoisting machinery that are easy to assemble and disassemble.

Background technique

Hoisting machinery refers to machinery that uses hooks or other pick-up devices to hang heavy objects and perform cyclical operations such as lifting and moving in space. Lifting machinery lifts or lifts and moves heavy objects through lifting hooks or other pick-up devices. The working process of hoisting machinery generally includes steps such as lifting, running, lowering and returning to the original position. The hoisting mechanism lifts the heavy object from the pick-up location through the pick-up device, shifts the heavy object through the running, slewing or luffing mechanism, and returns to the original position after dropping the heavy object at the designated place.

The working mechanism includes: hoisting mechanism, running mechanism, luffing mechanism and rotating mechanism, which are called the four major mechanisms of the crane. The lifting mechanism is a mechanism used to realize the vertical lifting of materials. It is an indispensable part of any crane, so it is the most important and basic mechanism of the crane; the lifting mechanism generally uses the driving structure to drive the hoisting cylinder to rotate, thereby pulling the wire rope Move up or lower the wire rope, and the lower end of the wire rope is connected with a sling to fix the transferred items.

Since the objects transferred by the hoisting machinery are often large in size and heavy in weight, in order to prevent the objects from falling due to obstacles in the lifting mechanism, an online monitoring device is required to directly monitor the lifting of the lifting mechanism to ensure the driving of the lifting mechanism When the motor is working, the hoist can rotate normally and work on the wire rope normally. At present, there is no online monitoring device for this area. Generally, it is judged whether it is working normally by the work experience of the staff. There is no intuitive data to prove that this area is abnormal.

Contents of the invention

The purpose of the present invention is to provide an easy-to-disassemble online monitoring device for hoisting machinery and a monitoring method thereof, so as to solve the problem that there is currently no online monitoring specifically for the working process of the driving motor on the hoisting mechanism to drive the hoist drum proposed in the background technology The device generally depends on the working experience of the staff to judge whether it is working normally, and there is no intuitive data to prove that the work is abnormal.

In order to achieve the above object, the present invention provides the following technical solution: an on-line monitoring device for hoisting machinery that is easy to disassemble, the on-line monitoring device is installed on the driving arm plate of the crane, and one side of the driving arm plate of the crane is provided with a mounting The upper end of the other side of the mounting plate is welded and fixed with a bearing seat, and a rotating worm wheel is rotatably connected in the bearing seat, and an angular velocity sensor is installed on the connection position between the bearing seat and the rotating worm wheel, and the other side of the mounting plate An L-shaped bracket is welded and fixed at the lower end of the L-shaped bracket, and a driving and rotating assembly is installed between the L-shaped bracket and the mounting plate. The driving and rotating assembly includes a cam and an intermediate shaft, and the cam and the intermediate shaft are located between the L-shaped bracket and the mounting plate. One end of the intermediate shaft is rotatably connected to the inner end surface of the cam through a bearing. A worm is arranged outside the intermediate shaft. A fixed sleeve is integrally connected to the side of the worm far away from the mounting plate. The worm and the fixed sleeve are provided with an intermediate slide cavity, the intermediate shaft slides along the intermediate sliding cavity, and the outside of the intermediate shaft is provided with a pressure spring along the other side of the worm, and a fixed ring is fixed at the connection position between the external of the intermediate shaft and the pressure spring, and the two ends of the pressure spring are respectively connected with the fixed ring and the The worm is rotatably connected by bearings, the intermediate shaft is provided with a through hole, the fixed sleeve is provided with a through hole, the through hole is installed with a fixed rod, and the fixed rod slides along the through slot. One end of the fixed rod is extended to the outside of the fixed sleeve to be fixed with the fixed end, and the fixed end is attached to the cam.

Preferably, the side of the cam close to the fixed sleeve is provided with a concave surface and a convex surface, and the concave surface and the convex surface transition smoothly, and an intermediate cavity is provided inside the cam, and the fixed sleeve slides and rotates along the intermediate cavity.

Preferably, a connecting bracket is provided at the lower end of the mounting plate close to one side of the crane driving arm plate, and a wire rope outer sleeve is provided on the other side of the connecting bracket, and the wire rope outer sleeve is connected to the connecting bracket through a connecting hinge. A wire speed sensor is embedded and fixed in the middle of the front end of the steel wire rope outer casing.

Preferably, a connecting assembly is provided between the crane driving arm plate and the mounting plate, the connecting assembly includes a first connecting plate, and a cross connection frame is welded and fixed on the side of the first connecting plate away from the crane driving arm plate, The inside of the cross connection frame forms a cross connection cavity, the inside of the cross connection cavity is embedded with a cross connection block, and the other side of the cross connection block is welded and fixed with a second connection plate, and the cross connection frame and the cross The connecting block is fixed by fixing bolts.

Preferably, a drive shaft is fixedly connected to the side of the first connection plate close to the crane drive arm plate, the drive shaft and the crane drive arm plate are rotatably connected through bearings, and the other end of the intermediate shaft passes through the mounting plate and is connected to the second connection plate. The disk is fixedly connected, and the intermediate shaft and the mounting disk are connected in rotation through bearings.

Preferably, the wire rope outer sleeve includes a front half and a rear half, the front half and the rear half are connected to the hinge end of the connecting hinge, the front half and the rear half include a connecting half ring and a connecting leaf, and the connecting leaf is fixed At the upper and lower ends of the connecting half ring away from the connecting hinge, a cylindrical hole is formed between the connecting half ring on the front half and the connecting half ring on the rear half, and the connecting half ring on the front half and the upper connecting half on the rear half The inner wall of the connecting half-ring is connected with connecting balls through the rotation of the horizontal axis.

Preferably, the connecting bracket includes a connecting rod portion, a downwardly extending T-shaped rod portion and a connecting plate portion, the connecting rod portion is located on both sides of the upper end of the downwardly extending T-shaped rod portion, and the connecting plate portion is located on the downwardly extending T-shaped rod portion. The lower end of the part is welded and fixed between the connecting bar part, the T-shaped bar part extending downwards and the connecting plate part adjacent to each other.

Preferably, the upper and lower ends of the mounting plate close to the crane driving arm plate are welded and fixed with mounting pages, and the mounting pages and the crane driving arm plate are fixed by fixing screws.

A monitoring method, comprising the steps of:

Step 1: The driving motor of the hoisting machine drives the hoisting cylinder to rotate, and the hoisting cylinder drives the driving shaft to rotate, so that the connecting components rotate as a whole, and the intermediate shaft is driven to rotate synchronously;

Step 2: The intermediate shaft is provided with a fixed rod in the through slot hole, and the limit sliding relationship between the fixed rod and the through slot hole makes the intermediate shaft drive the worm and the fixed sleeve to rotate synchronously. Due to the elasticity of the pressure spring, the fixed end The concave surface and the convex surface of the fitting cam rotate circularly, so that the worm is driven to rotate and slide reciprocally at the same time;

Step 3: When the fixed end fits the concave surface of the cam, the fixed sleeve slides while rotating into the middle cavity of the cam, the worm drives the rotating worm wheel to rotate, and the angular velocity sensor monitors the rotational angular velocity;

Step 4: When the fixed end fits the convex surface of the cam, the fixed sleeve slides along the middle cavity of the cam and rotates outward. At this time, the worm rotates along the teeth of the rotating worm wheel, and the rotating worm wheel does not rotate;

Step 5: Every time the intermediate shaft drives the worm to rotate a circle, the worm wheel rotates at a certain angle, and the angular velocity sensor detects a rotation signal;

Step 6: The hoisting machine drives the motor to drive the hoisting cylinder to rotate, the steel wire rope on the hoisting cylinder rotates, and the entire steel wire rope moves upward or downward, and the linear speed sensor monitors the speed of the steel wire rope moving upward or downward online.

Compared with prior art, the beneficial effect of the present invention is:

1. In this invention, the driving motor of the hoisting machine drives the hoisting cylinder to rotate, and the hoisting cylinder drives the driving shaft to rotate, so that the connecting components rotate as a whole, and the intermediate shaft is driven to rotate synchronously. There is a fixed rod in the through slot hole on the intermediate shaft, and the limited sliding relationship between the fixed rod and the through slot hole makes the intermediate shaft drive the worm and the fixed sleeve to rotate synchronously, and the fixed end fits the cam due to the elasticity of the pressure spring The concave and convex surfaces of the worm wheel rotate cyclically, so that the worm is driven to rotate and slide back and forth; every time the intermediate shaft drives the worm to rotate a circle, the worm wheel rotates at a certain angle, and the angular velocity sensor monitors a rotation signal. The angular velocity sensor transmits the signal to the application background through the wireless data transmission module. According to the pitch and the number of teeth of the worm and the rotating worm wheel, the background can obtain the rotating speed of the worm through the rotating speed of the rotating worm wheel, and compare it with the output speed of the hoisting machinery to judge whether it is The driver is abnormal. In the whole process, relying on data analysis to obtain health monitoring results, rather than relying on manual experience judgment, is more accurate and more scientific, and solves the problem that there is currently no online monitoring device specifically for the working process of the drive motor on the lifting mechanism to drive the winding drum. Rely on the working experience of the staff to judge whether it is working normally, and there is no intuitive data to prove that the work is abnormal.

2. In this invention, through the elastic effect of the pressure spring, when the fixed end rotates to fit the concave surface of the cam, the fixed sleeve slides while rotating into the middle cavity of the cam, the worm drives the rotating worm wheel to rotate, and the angular velocity sensor monitors the rotational angular velocity ; When the fixed end rotates to fit the convex surface of the cam, the fixed sleeve rotates and slides outward along the middle cavity of the cam, and at this time the worm rotates along the tooth portion of the rotating worm wheel to reset; in this way, the worm is driven to rotate and circulate at the same time Reciprocating sliding. Through the mutual cooperation of the structures, the worm wheel rotates at a small angle while the worm is constantly rotating, and the measurement results are more accurate.

3. In this invention, the driving motor on the hoisting machine drives the hoist drum to rotate, the wire rope on the hoist drum rotates, and the entire wire rope moves upward or downward, and the linear speed sensor monitors the speed of the wire rope moving upward or downward online. Every time the linear speed sensor transmits a speed signal, it means that the steel wire rope is moving upward or downward in this state. When the angular speed sensor continues to output signals, but the linear speed sensor does not output signals, it means that the drive motor is driving normally, but the steel wire rope is not moving. Tendency, the wire rope may be wound on other fixed structures, so that the lower end of the wire rope does not move. In this state, the driving work will cause the two positions of the wire rope to pull in opposite directions, damaging the structure of the equipment. Through the cooperation of the two sensors, it can be monitored If the data is abnormal, judge the specific situation of the abnormality, so as to stop the drive and quickly carry out maintenance work.

4. In this invention, the installation page is aligned with the crane driving arm plate, and at the same time, the cross connection block on the second connection plate is aligned with the cross connection cavity of the cross connection frame on the first connection plate, and inserted; the crane drive arm is fixed by fixing screws Use the fixing bolts to fix the cross connection frame and the cross connection block; turn and open the front half and the rear half of the steel wire rope outer sleeve, so that the steel wire rope of the hoisting machine is placed in the cylindrical hole, and the steel wire rope is in contact with the connecting ball. Utilize bolts to fix the upper connection pages of the front half and the rear half to complete the installation of the online monitoring device. The whole installation process is simple, and the operation can be reversed when dismounting, which can reduce the installation steps while satisfying the drive monitoring.

Description of drawings

Fig. 1 is a side view of an on-line monitoring device for hoisting machinery that is easy to disassemble according to the present invention;

Fig. 2 is a schematic diagram of an exploded structure of a connection assembly and a mounting plate of an on-line monitoring device for hoisting machinery that is easy to disassemble according to the present invention;

Fig. 3 is a schematic diagram of the connection structure of the first connection plate and the cross connection frame of an on-line monitoring device for hoisting machinery that is easy to disassemble according to the present invention;

Fig. 4 is a schematic diagram of an exploded structure of a driving and rotating assembly of an on-line monitoring device for hoisting machinery that is easy to disassemble according to the present invention;

Fig. 5 is a structural schematic diagram of a cam of an on-line monitoring device for hoisting machinery that is easy to disassemble according to the present invention;

Fig. 6 is a three-dimensional structural schematic diagram of a wire rope outer casing of a hoisting machinery online monitoring device that is easy to disassemble according to the present invention;

Fig. 7 is a three-dimensional structural schematic diagram of a connecting bracket of an on-line monitoring device for hoisting machinery that is easy to assemble and disassemble according to the present invention.

In the figure: 1. Crane drive arm plate; 2. Drive shaft; 3. Connection assembly; 4. Installation plate; 5. Installation page; 6. First connection plate; 7. Cross connection frame; 8. Cross connection cavity; 9 10, the second connection plate; 11, the intermediate shaft; 12, the fixing bolt; 13, the fixing screw; 14, the bearing seat; 15, the rotating worm wheel; 16, the angular velocity sensor; 17, the L-shaped bracket; 18, Drive rotation assembly; 19, through slot hole; 20, pressure spring; 21, worm; 22, fixed sleeve; 23, through hole; 24, fixed rod; 25, fixed end; 26, middle sliding chamber; 27, cam ; 28, concave surface; 29, convex surface; 30, middle cavity; 31, connecting bracket; 32, connecting hinge; 33, wire rope outer sleeve; 34, line speed sensor; 37, connecting plate portion; 38, front half; 39, rear half; 40, connecting half ring; 41, connecting page; 42, cylindrical hole; 43, connecting ball.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention.

Please refer to Figures 1-7, an embodiment provided by the present invention: an on-line monitoring device for hoisting machinery that is easy to disassemble. There is a mounting plate 4, the upper end of the other side of the mounting plate 4 is welded and fixed with a bearing seat 14, the bearing seat 14 is connected with a rotating worm wheel 15 in rotation, and an angular velocity sensor 16 is installed on the bearing seat 14 at the connection position with the rotating worm wheel 15, and the mounting plate 4 The lower end of the other side is welded and fixed with an L-shaped bracket 17, and a driving rotation assembly 18 is installed between the L-shaped bracket 17 and the mounting plate 4. The driving rotation assembly 18 includes a cam 27 and an intermediate shaft 11, and the cam 27 and the intermediate shaft 11 are located at the L Between the bracket 17 and the mounting plate 4, one end of the intermediate shaft 11 is rotatably connected to the inner end surface of the cam 27 through a bearing, and the outside of the intermediate shaft 11 is provided with a worm 21, and the side of the worm 21 away from the mounting plate 4 is integrally connected with a fixed sleeve 22. The worm 21 and the fixed sleeve 22 are provided with an intermediate sliding cavity 26, the intermediate shaft 11 slides along the intermediate sliding cavity 26, the intermediate shaft 11 is provided with through slots 19, and the fixed sleeve 22 is provided with through holes 23. A fixed rod 24 is installed in the through hole 23, and the fixed rod 24 slides along the through slot 19. Therefore, when the intermediate shaft 11 rotates, due to the position limitation of the fixed rod 24 in the through slot 19, the worm 21 and the fixed sleeve are driven. 22 rotate synchronously, one end of the fixed rod 24 extends to the outside of the fixed sleeve 22 and is fixed with the fixed end 25, and the fixed end 25 fits with the cam 27; the side of the cam 27 close to the fixed sleeve 22 is provided with a concave surface 28 and a convex surface 29, the concave surface 28 and the convex surface 29 transition smoothly, and the inside of the cam 27 is provided with an intermediate cavity 30, and the fixed sleeve 22 slides and rotates along the intermediate cavity 30.

The outside of the intermediate shaft 11 is provided with a pressure spring 20 along the other side of the worm 21, and a fixing ring is fixed at the connection position between the outside of the intermediate shaft 11 and the pressure spring 20. The pressure spring 20 is only used as an intermediate connecting member to keep the fixed end 25 in constant motion contact with the cam 27, and the pressure spring 20 itself does not follow the intermediate shaft 11 and the worm 21 to rotate.

Please refer to Fig. 1, the lower end of the mounting plate 4 near the crane driving arm plate 1 side is provided with a connecting bracket 31, and the other side of the connecting bracket 31 is provided with a steel wire rope outer sleeve 33, and the steel wire rope outer sleeve 33 and the connecting bracket 31 are connected through a connecting hinge 32 Connect, the middle of wire rope outer casing 33 front ends is embedded and fixed with line speed sensor 34.

Referring to Fig. 1, Fig. 2 and Fig. 3, a connecting assembly 3 is arranged between the crane driving arm plate 1 and the mounting plate 4, the connecting assembly 3 includes a first connecting plate 6, and the first connecting plate 6 is far away from the side of the crane driving arm plate 1. One side is welded and fixed with a cross connection frame 7, the inside of the cross connection frame 7 forms a cross connection cavity 8, and the inside of the cross connection cavity 8 is embedded with a cross connection block 9, and the cross connection frame 7 and the cross connection block 9 can be quickly connected, The other side of the cross connection block 9 is welded and fixed with a second connection plate 10, and the cross connection frame 7 and the cross connection block 9 are fixed by fixing bolts 12; Shaft 2, drive shaft 2 and crane drive arm plate 1 are rotationally connected through bearings, the other end of intermediate shaft 11 is fixedly connected with second connecting disc 10 through mounting disc 4, and intermediate shaft 11 is rotationally connected with mounting disc 4 through bearings.

A monitoring method, comprising the steps of:

Step 1: The driving motor of the hoisting machine drives the hoist to rotate, and the hoist drives the drive shaft 2 to rotate, so that the connecting assembly 3 rotates as a whole, and the intermediate shaft 11 is driven to rotate synchronously;

Step 2: The intermediate shaft 11 is provided with a fixed rod 24 in the through slot 19, and the limit sliding relationship between the fixed rod 24 and the through slot 19 makes the intermediate shaft 11 drive the worm 21 and the fixed sleeve 22 to rotate synchronously. The elasticity of 20 makes the fixed end 25 stick to the concave surface 28 and the convex surface 29 of the cam 27 to rotate outwards, so that the worm 21 is driven to rotate and slide reciprocally at the same time;

Step 3: When the fixed end 25 fits the concave surface 28 of the cam 27, the fixed sleeve 22 slides while rotating toward the inner side of the middle cavity 30 of the cam 27, the worm 21 drives the rotating worm wheel 15 to rotate, and the angular velocity sensor 16 monitors the rotational angular velocity;

Step 4: When the fixed end 25 fits the convex surface 29 of the cam 27, the fixed sleeve 22 rotates outward along the middle cavity 30 of the cam 27 and slides outward. At this time, the worm 21 rotates along the tooth portion of the rotating worm wheel 15, and the rotating worm wheel 15 does not rotate;

Step 5: The intermediate shaft 11 drives the worm 21 to rotate once, and the worm wheel 15 rotates at a certain angle, and the angular velocity sensor 16 detects a rotation signal;

Step 6: The hoisting machine drives the motor to drive the hoisting drum to rotate, the wire rope on the hoisting drum rotates, and the entire wire rope moves upward or downward, and the linear speed sensor 34 monitors the speed of the wire rope moving upward or downward online.

The specific monitoring data comparison process is as follows:

The angular velocity sensor 16 transmits the signal to the application background through the wireless data transmission module. According to the pitch and the number of teeth of the worm 21 and the rotating worm wheel 15, the background can obtain the rotating speed of the worm 21 through the rotating speed of the rotating worm wheel 15, and the output speed of the hoisting machinery Compare and judge whether the drive is abnormal;

The linear speed sensor 34 monitors the speed of the upward or downward movement of the steel wire rope online. Every time a speed signal is transmitted, it indicates that the steel wire rope is in an upward or downward motion state in this state. When the angular velocity sensor 16 continues to output signals, the linear speed sensor 34 does not output signals. In this case, it means that the driving motor is normally driven, but the steel wire rope has no tendency to move. The steel wire rope may be wound on other fixed structures, so that the lower end steel wire rope does not move. In this state, the driving work will cause the two positions of the steel wire rope to pull in opposite directions and damage the The structure of the device.

Referring to Fig. 1 and Fig. 6, wire rope outer sleeve 33 comprises front half part 38 and rear half part 39, and front half part 38 and rear half part 39 are connected with the hinge end connecting hinge 32, and promptly front half part 38 and rear half part 39 can Rotate relative to the connecting bracket 31; the front half 38 and the rear half 39 include a connecting half ring 40 and a connecting leaf 41, and the connecting leaf 41 is fixed on the upper and lower ends of the connecting half ring 40 away from the connecting hinge 32 side, and the front half 38 is connected A cylindrical hole 42 is formed between the half-ring 40 and the half-ring 40 on the back half 39, and the inner wall of the half-ring 40 on the front half 38 and the half-ring 40 on the back half 39 are connected with a connecting ball 43 through a horizontal axis rotation. , reduce the frictional force when the steel wire rope moves up and down, and avoid the situation that the steel wire rope is worn in the steel wire rope outer casing 33.

Please refer to Fig. 1 and Fig. 7, connecting bracket 31 comprises connecting rod part 35, downwardly extending T-shaped rod part 36 and connecting plate part 37, and connecting rod part 35 is positioned at the both sides of extending down T-shaped rod part 36 upper end, connects The plate portion 37 is located at the lower end of the downwardly extending T-shaped bar portion 36 , and the connecting bar portion 35 , the downwardly extending T-shaped bar portion 36 and the connecting plate portion 37 are fixed by welding.

Referring to Fig. 1 and Fig. 2, the upper and lower ends of the mounting plate 4 near the side of the crane driving arm plate 1 are welded and fixed with an installation page 5, and the installation page 5 and the crane driving arm plate 1 are fixed by fixing screws 13.

An installation method, comprising the steps of:

Step 1: align the installation page 5 of the device with the crane driving arm plate 1, and at the same time align the cross connection block 9 on the second connection plate 10 with the cross connection cavity 8 of the cross connection frame 7 on the first connection plate 6, and insert ;

Step 2: Use fixing screws 13 to fix the crane driving arm plate 1 and the installation plate 4, and use fixing bolts 12 to fix the cross connection frame 7 and the cross connection block 9;

Step 3: Turn and open the front half 38 and the rear half 39 of the steel wire rope outer sleeve 33, place the steel wire rope of the hoisting machine in the cylindrical hole 42, the steel wire is in contact with the connecting ball 43, and fix the front half 38 and the second half with bolts Link to page 41 on item 39 to complete the installation of the online monitoring device.

It will be apparent to those skilled in the art that the invention is not limited to the details of the above-described exemplary embodiments, but that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Accordingly, the embodiments should be regarded in all points of view as exemplary and not restrictive, the scope of the invention being defined by the appended claims rather than the foregoing description, and it is therefore intended that the scope of the invention be defined by the appended claims rather than by the foregoing description. All changes within the meaning and range of equivalents of the elements are embraced in the present invention. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims (8)

1. An online monitoring device for hoisting machinery that is easy to disassemble, the online monitoring device is installed on the crane driving arm plate (1), and it is characterized in that: one side of the crane driving arm plate (1) is provided with a mounting disc (4), the upper end of the other side of the mounting disc (4) is welded and fixed with a bearing seat (14), and a rotating worm wheel (15) is rotatably connected in the bearing seat (14), and the bearing seat (14) An angular velocity sensor (16) is installed at the connection position with the rotating worm wheel (15), and the lower end of the other side of the mounting plate (4) is welded and fixed with an L-shaped bracket (17), and the L-shaped bracket (17) is connected to the mounting plate (4) is installed with drive rotation assembly (18), and described drive rotation assembly (18) comprises cam (27) and intermediate shaft (11), and cam (27) and intermediate shaft (11) are positioned at L shape support (17) ) and the mounting plate (4), one end of the intermediate shaft (11) is rotationally connected with the inner end surface of the cam (27) through a bearing, and the outside of the intermediate shaft (11) is provided with a worm (21), and the worm (21 ) is integrally connected with a fixed sleeve (22) on one side away from the mounting plate (4), and an intermediate sliding cavity (26) is arranged in the worm (21) and the fixed sleeve (22), and the intermediate shaft (11) is along the The middle sliding cavity (26) slides, and the outside of the middle shaft (11) is provided with a pressure spring (20) along the other side of the worm (21), and the outside of the middle shaft (11) is fixed with a fixed spring (20) at the connection position. ring, the two ends of the pressure spring (20) are respectively connected to the fixed ring and the worm (21) through bearing rotation, the intermediate shaft (11) is provided with a through slot (19), and the fixed sleeve (22) A through hole (23) is provided through the upper part, and a fixed rod (24) is installed in the through hole (23). The fixed rod (24) slides along the through slot hole (19). One end of the fixed rod (24) Extend to the outside of the fixed sleeve (22) and fix it with the fixed end (25), the fixed end (25) fits the cam (27), and the mounting plate (4) is close to the side of the crane driving arm plate (1) The lower end of the connecting bracket (31) is provided with a connecting bracket (31), and the other side of the connecting bracket (31) is provided with a steel wire rope outer sleeve (33), and the steel wire rope outer sleeve (33) and the connecting bracket (31) are connected through a connecting hinge (32) connection, the middle of the front end of the outer sleeve of the steel wire rope (33) is embedded with a fixed linear speed sensor (34); the linear speed sensor (34) monitors the speed of the upward or downward movement of the steel wire rope online, and every time a speed signal is transmitted, the steel wire rope is in the upward direction. Or in the state of downward movement, when the angular velocity sensor (16) continues to output signals, but the linear velocity sensor (34) does not output signals, it indicates that the drive motor is driving normally, but the steel wire rope has no tendency to move, and the steel wire rope may be wound around other fixed structures Make sure that the lower wire rope does not move. In this state, the driving work will cause the two positions of the wire rope to be pulled in opposite directions, which will damage the structure of the equipment. 2. An on-line monitoring device for hoisting machinery that is easy to disassemble according to claim 1, characterized in that: the side of the cam (27) close to the fixed sleeve (22) is provided with a concave surface (28) and a convex surface (29), the concave surface (28) and the convex surface (29) transition smoothly, and the inside of the cam (27) is provided with an intermediate cavity (30), and the fixed sleeve (22) slides and rotates along the intermediate cavity (30). 3. An easy-to-disassemble online monitoring device for hoisting machinery according to claim 1, characterized in that: a connecting component (3) is arranged between the crane driving arm plate (1) and the mounting plate (4) , the connection assembly (3) includes a first connection plate (6), the side of the first connection plate (6) away from the crane driving arm plate (1) is welded and fixed with a cross connection frame (7), the cross The inside of the connection frame (7) forms a cross connection cavity (8), the inside of the cross connection cavity (8) is embedded with a cross connection block (9), and the other side of the cross connection block (9) is welded and fixed with The second connection plate (10), the cross connection frame (7) and the cross connection block (9) are fixed by fixing bolts (12). 4. An on-line monitoring device for hoisting machinery that is easy to disassemble according to claim 3, characterized in that: the side of the first connecting plate (6) close to the crane driving arm plate (1) is fixedly connected with a drive The shaft (2), the driving shaft (2) is rotationally connected with the crane driving arm plate (1) through a bearing, and the other end of the intermediate shaft (11) passes through the mounting plate (4) and is fixedly connected to the second connecting plate (10) , the intermediate shaft (11) is rotationally connected with the mounting disc (4) through a bearing. 5. An easy-to-disassemble online monitoring device for hoisting machinery according to claim 1, characterized in that: the wire rope outer casing (33) includes a front half (38) and a rear half (39), the first half (38) and the rear half (39) are connected with the hinge end of the connecting hinge (32), and the front half (38) and the rear half (39) include connecting half rings (40) and connecting pages (41), The connecting leaf (41) is fixed on the upper and lower ends of the connecting half ring (40) away from the connecting hinge (32) side, the connecting half ring (40) on the front half (38) and the connecting half on the rear half (39). Form a cylindrical hole (42) between the rings (40), and the inner wall connecting the half-ring (40) and the rear half-piece (39) on the front half (38) is connected by a horizontal shaft rotation. Attach the ball (43). 6. An on-line monitoring device for hoisting machinery that is easy to disassemble according to claim 1, characterized in that: the connecting bracket (31) includes a connecting rod part (35), a T-shaped rod part (36) extending downward ) and the connecting plate portion (37), the connecting rod portion (35) is located on both sides of the upper end of the T-shaped bar portion (36) extending downwards, and the connecting plate portion (37) is located at the lower end of the T-shaped bar portion (36) extending downwards , the connecting rod portion (35), the downwardly extending T-shaped rod portion (36) and the connecting plate portion (37) are welded and fixed adjacent to each other. 7. An on-line monitoring device for hoisting machinery that is easy to disassemble according to claim 1, characterized in that: the upper and lower ends of the mounting plate (4) close to the side of the crane driving arm plate (1) are welded and fixed with The installation page (5), the installation page (5) and the crane driving arm plate (1) are fixed by fixing screws (13). 8. A monitoring method, realized based on the easy-to-disassemble online monitoring device for hoisting machinery according to claim 4, characterized in that it comprises the following steps: Step 1: The driving motor of the hoisting machine drives the hoisting cylinder to rotate, and the hoisting cylinder drives the driving shaft (2) to rotate, so that the connecting assembly (3) rotates as a whole, and the intermediate shaft (11) is driven to rotate synchronously; Step 2: The intermediate shaft (11) is provided with a fixed rod (24) in the through slot hole (19), and the limit sliding relationship between the fixed rod (24) and the through slot hole (19) makes the intermediate shaft (11) drive the worm (21) and the fixed sleeve (22) rotate synchronously, and the concave surface (28) and the convex surface (29) of the fixed end (25) are attached to the cam (27) are rotated circularly due to the elasticity of the pressure spring (20) outwards, so that The worm (21) slides reciprocally while being driven to rotate; Step 3: When the fixed end (25) fits the concave surface (28) of the cam (27), the fixed sleeve (22) slides while rotating toward the inner side of the middle chamber (30) of the cam (27), and the worm (21) drives The rotating worm wheel (15) rotates, and the angular velocity sensor (16) monitors the rotational angular velocity; Step 4: When the fixed end (25) fits the convex surface (29) of the cam (27), the fixed sleeve (22) slides outwards while rotating along the middle chamber (30) of the cam (27), at this time the worm ( 21) Rotate along the tooth portion of the rotating worm wheel (15), and the rotating worm wheel (15) does not rotate; Step 5: The intermediate shaft (11) drives the worm (21) to rotate once, and the worm wheel (15) rotates at a certain angle, and the angular velocity sensor (16) detects a rotation signal; Step 6: The hoisting machine drives the motor to drive the hoisting drum to rotate, the wire rope on the hoisting drum rotates, and the entire wire rope moves upward or downward, and the linear speed sensor (34) monitors the speed of the wire rope moving upward or downward online.

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